CREDITS TO TERRY / TERRYCHU on the Pure Pure Discord server for buying this book.
"From 13cm Wiki What A Wonderful World is a doujinshi DVD-rom created by one of the main authors of the original Neko Kawaigari! visual novel, and distributed at Comic Market 71 on August 13, 2006.[1] It revolves the "true" after ending story and became the concluding version of the story. As it was published as a special comic form, a doujinshi, access to a copy became difficult depending on the costumer base. However, due to the consideration of the production side, the content was released for free on the internet as "web-edition".
In addition, "Souvenir" distributed a reprinted booklet of the web-novel, free of charge, at Comic Market 78. Currently the contents are publicly accessible on pixiv. "